TASK 72-00-50-220-002 LPT Module - Examine The LPT Case And Rotor At Interface N-50/10, Inspection-002

DMC:V2500-A0-72-00-5000-01A-300A-B|Issue No:003.00|Issue Date:2019-11-01

Export Control

EAR Export Classification: Not subject to the EAR per 15 C.F.R. Chapter 1, Part 734.3(b)(3), except for the following Service Bulletins which are currently published as EAR Export Classification 9E991: SBE70-0992, SBE72-0483, SBE72-0580, SBE72-0588, SBE72-0640, SBE73-0209, SBE80-0024 and SBE80-0025.

Copyright

© IAE International Aero Engines AG (2001, 2014 - 2021) The information contained in this document is the property of © IAE International Aero Engines AG and may not be copied or used for any purpose other than that for which it is supplied without the express written authority of © IAE International Aero Engines AG. (This does not preclude use by engine and aircraft operators for normal instructional, maintenance or overhaul purposes.).

Applicability

All

Common Information

TASK 72-00-50-220-002 LPT Module - Examine The LPT Case And Rotor At Interface N-50/10, Inspection-002

General

The word 'reject' after an interface inspection statement requires that further detailed inspection or repair as applicable, of the affected area be accomplished using data in the applicable ATA section of the part in question. Contact IAE for FAA approved data if the referenced TASK is not in the manual.

Refer to TASK 72-00-00-200-000, before you do this TASK.

The policy that is necessary for inspection is given in the SPM TASK 70-20-01-200-501.

Preliminary Requirements

Pre-Conditions

NONE

Support Equipment

NameManufacturerPart Number / IdentificationQuantityRemark
Illuminated magnifier (portable)LOCALIlluminated magnifier (portable)

Consumables, Materials and Expendables

NONE

Spares

NONE

Safety Requirements

NONE

Procedure

    1. SUBTASK 72-00-50-220-141 General Instructions for the Inspection of the LP Turbine at Interface

    1. Before inspection, clean the interface parts. Refer to TASK 72-00-50-100-001 (CLEANING-001).

    2. For the inspections use the Illuminated magnifier (portable).

    2. SUBTASK 72-00-50-220-060 Visually Examine the Rear Locknut of the LP Turbine Shaft at Location 1

    1. Refer to Figure.

      2. Nicked or scratched

        1. Not more than 0.004 in. (0,10 mm) maximum depth.

        1. Accept

        2. More than in Step.

        1. Reject

      3. Cracked

      1. Reject

    3. SUBTASK 72-00-50-220-061 Visually Examine the Blind Cap at Location 2

    1. Refer to Figure.

      2. Scratched

        1. Not more than 0.004 in. (0,10 mm) maximum depth.

        1. Accept

        2. More than in Step.

        1. Reject

      3. Cracked

      1. Reject

    4. SUBTASK 72-00-50-220-062 Visually Examine the OD (Outer Diameter) Surface of the LP Turbine Shaft Diameter at Location 3

    1. Refer to Figure.

      2. Pitted or corroded

      1. Reject

    5. SUBTASK 72-00-50-220-063 Visually Examine the ID (Inner Diameter) Surface of the LP Turbine Shaft Snap Diameter at Location 4

    1. Refer to Figure.

      2. Nicked or scratched

        1. Not more than 0.004 in. (0,10 mm) maximum depth.

        1. Accept

        2. More than in Step.

        1. Reject

      3. Corroded

      1. Reject

      4. Plugged (oil supply hole)

      1. Reject

      5. Coked

      1. Accept

    6. SUBTASK 72-00-50-220-064 Visually Examine the Tangs of the LP Turbine Shaft at Location 5

    1. Refer to Figure.

      2. Bent

      1. Accept

      3. Cracked

      1. Reject

    7. SUBTASK 72-00-50-220-065 Visually Examine the Internal Retaining Rings at Locations 6 and 7

    1. Refer to Figure.

      2. Distorted

      1. Reject

      3. Loosed

      1. Reject

    8. SUBTASK 72-00-50-220-066 Visually Examine the Locking Ring at Location 8

    1. Refer to Figure.

      2. Distorted

      1. Reject

      3. Cracked

      1. Reject

    9. SUBTASK 72-00-50-220-142 Visually Examine the Shrouds of the Stage 7 Turbine Blades at Location 10

      NOTE

      Do the examination to the extent possible.

    1. Refer to Figure.

      2. Cracked

      1. Reject

      3. Small and shallow dents

        1. Not more than 0.005 in. (0,13 mm) maximum depth.

        1. Accept

        2. More than in Step.

        1. Reject

      4. Obvious FOD/BMOD

      1. Reject

    10. SUBTASK 72-00-50-220-143 Visually Examine the Airfoils of the Stage 7 Turbine Blades at Location 9

      NOTE

      Do the examination to the extent possible.

    1. Refer to Figure.

      2. Cracked

      1. Reject

      3. Small and shallow dents

        1. Not more than 0.005 in. (0,13 mm) maximum depth.

        1. Accept

        2. More than in Step.

        1. Reject

      4. Obvious FOD/BMOD

      1. Reject

    11. SUBTASK 72-00-50-220-165 Visually Examine the Stage 6 Turbine Inner Air Seal at Location 11

      NOTE

      Do the examination to the extent possible.

    1. Refer to Figure.

      2. Cracked

      1. Reject

    12. Figure: Locations at interface N-50/10

    Locations at interface N-50/10

    Figure: Locations at interface N-50/10

    Locations at interface N-50/10

Requirements After Job Completion

Follow-On Conditions

NONE
Change Type:

Updated incorrect reference. (Editorial)

Manufacturer Code:LOCAL
Enterprise Name:LOCALLY SUPPLIED
Manufacturer Code:LOCAL
Tool Number:Illuminated magnifier (portable)
Tool Name:Illuminated magnifier (portable)